Daktronics BA-515, Руководство пользователя, Страница: 71 / 208

TNMC Maintenance
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The module latches must be fully engaged to create a watertight seal around the edge of
the module. The module should be firmly seated against the display when the latches
are fully engaged.
Power Supplies
Reference Drawings:
Schematic, Amber TNMC, GEN IV ......................................................... Drawing A-252645
Schematic, Red TNMC, GEN IV ............................................................. Drawing A-252681
Schematic; 832 / 848 / 864 Red TNMC GEN IV, 240V .......................... Drawing A-294858
Schematic; 832 / 848 / 864 Amber GEN IV, 240V .................................. Drawing A-294919
The red-LED TNMC uses a single power supply assembly to power all modules in the 8x32
and 8x48 models. The amber TNMC uses a dual power supply assembly to power all
modules in the 8x32 or 8x48 models. Refer to
Drawings A-252645 , A-252681 , A-294858 , or
A-294919 .
Removing/Changing a Power Supply
Complete the following steps to remove a power supply from the display:
1.
See the directions in the preceding Module and Drivers subsection for information
on how to access the component from the front or rear.
2.
Disconnect all the wires connected to the power supply.
3.
Remove the hardware holding the power supply in place to free the unit.
4.
Follow these steps in reverse order to install a new power supply.
Weatherstripping
To ensure that the display is waterproof, weatherstripping has been installed around the
entire display and around each module. It is important that the weatherstripping is attached
properly at all times, or water may leak into the display and damage the components.
9.6 TNMC Display Maintenance
Complete a yearly inspection to maintain safe and dependable display operation. This
inspection should address the following issues:
•
Loose Hardware
Verify that fasteners, such as bolts and rivets, have not come loose. Check and tighten or
replace fasteners as required.
•
Excessive Dust Buildup
Occasionally, it may be necessary to vacuum the inside of the display cabinet to remove
dust/dirt buildup that may interfere with airflow.
•
Water Intrusion – Water stain marks
Water can enter the display where weatherstripping has come loose or deteriorated;
where fasteners have come loose, allowing gaps in the panels; or where moisture may be
entering around hardware. Check electronic components for corrosion.